Sewing machine



Aug. 3, 1943. A. H. WEIS SEWING MACHINE Filed Dec. 4, 1940 2 Sheets-Sheet l INVENTOR AHaerT Weis- Elj W/ZMJ ATTORNEYS Aug. 3, 1943. A. H. WEIS 2,325,644

' SEWING MACHINE Filed Dec. 4, 1940 2 Sheets-Sheet 2 INVENTOR is BYAJEHT Weis l -Jcyw ATTORNEYS Painted A 494 If S i i 8 2,325,644

'UNITED STATES PATENTfoFl-ics 12,325,644" a a "tj-W me MACHINE r Albert inweiaisyackm. Yaassig nortowillcox by i 8; Gibbs Sewing MachinepompanypNew Yoliky 1 u 1 a ,1; NJa wr fien ie k 1 i 1, Appl ication December 4, 194o,ser a1 No; 368,423 "1 V 90mins; Cl.112200) 1 @This invention relatesto sewing machinesand Fig 6 is" a detail yiew oi thesnap eictin particularly tolooperrnechanisms and their drivgretairjilngelement. 1

ing connectio ns as used insewingmachines. Before describingthepresent improvements It is an object of the invention'yto provide a and mode of operation thereof in-detailit-should sewing machinein which access to the looper; or be understoodthat} the invention is nct'limited loopersyf or the purpose of threading; replace to thedetails of censtruction' and arrangement v mentand' inspection may be facilitated, of parts shown in the'accompanying' drawings,

lt 'isanother objectof the invention toprovide which are'merely illustratiyeo f' thepresent pre means of a simple and effective-nature through erred embodiments, since the invention isca'paand by which the immediatelyforego'ing object 1.0 ble of other embodiments, and the phraseology nlay beaccomplished; 1 1 i i employed is for the purpose oi descriptionland A feature ofthe invention, resulting inthe atnot of limitation.

*tainment of the foregoingobjeets, residesjin' the Referring more particularlyfl'tothe drawings 3 provision of a sewing machine including a conthereisshowri for the purposefillustrating an nectingi-rod or driving member for 'rockin'g a advantageousembodimentof"the presenu venlooper-carrierlmember and *itsassoeiatedfilooper "tion; a sewing machine which in general organiandin which a particularly effective means is zation is substantially identical withthe sewing provided'for readily connecting the driving memmachine shown in my'prior Patent No. 1, 9 06,29 i,

her and looper carrier member and also-for disv grantedMay 2,1 1933.

connecting the driving mernber and looper carrier P This sewing a e c ud s a b se 0 b W member to enable movement of these members arm from which extends ;a hollow trunk l2 thereto. I i

l 'Anotherfeature of theinventionresides in the V to positions where ready} access; may -be had 7 zserving a-s a supporUf r an overhanging arm 13 i terminating in a head l4 mounting, in a'usu'al resides in the provision of a sewing machinein which ready accessmay be had not' onlysto a looper carrier member and associated looper but i 19 for advancing the work; a

' gpresser bar, not shown, and presser'footafl which Another and related feature of the jinyention manner, a needle bar 15 andneedlelfi and also a cooperatescwith athroat plate in and feed dog also to a looper thread member carried by'and Aipulley'orrbelt wheel ZOQcarriedbyFa Icrank I :rnovable with the connecting member' by -which the looper carrier member is rocked.

shaft 2| mounted in bearings 22411112: 011 the ubase H erves as a means forttransmitting rotary movement directly :to the-crank shaft 2| hand,

very eflective, positiveandautomatically acting l 5 through the connecting rods ,fto acrank shaft means by which a driving. component may b se. supportedby bearings 26jand 21 in the .oyer- CUIBIYCOIIHGCtBdHtO\a IId wholly disconnected hanging'arm and operativelyconnected bylthe.

'froman operating; comp nent of:- a *vsejwing f': machine. 1 j ":barli. m

Other objects, features andeadvantages will i .Connected tothejeranl; shaiazl by acoupling hereinafter appear. l i r V e, n 291s. a main drive shaft uextendingldngitudi- Y InJthedrawings:

" embodying the present inventiom the rmm or,

nally of theglower arm I l' and supported in i a the sewing machine beingshowniliicdotte'd lines trunk l2' supports, afclothvor worknplateii VA and in sectiont'o facilitatethedisclosure oflthoseliy isuitable feed lifting eccentric 36!;o'n thelshaft 30 elementsincorporating thenovelfeatures of the ,im y be r vid dtiorraisingwandilowering.the

invention. e f Y y r y i k e p zh p r tiv View illustratinggthej 7, Likewise, suitable and usualmeansynot shown, Q novel: association a h d bf t qb yy be, provided for effecting backyaridxfoifith' component of the sewing machine.

,i ng rod, shown in Fig; .4.

4 l feed doglfl and its carrier 31 in ausual manner.

ineedle reciprocating mechanism 1 2B to the needle I Figural is a ironmewttia saving team; bearing 3| provi e ta da d :Whichfl :sether with abracket, 33 and an apron ae ion the carrier 1 whichjtggethrjicgnstjtflte amovernents of:the' feed dog carrier and the :feed

operating component of the sewing machine, and s unbo v q 1 i the connecting rod which constitntes a {driyinggm A1501, aoperated through iconnections-withtthe ments between "the looper carrier connect:- looper 39andmounted for rocking movementon Fig. 4 is an enlarged detailjview' T55- ing portioiiafll of the looper' cai'riersand whieh organizationof elements wherebythe looper car; "are screwed into lugskfl and: 43 jojffa ddiietail er] and connectingrbdinay be soreadily co t '1 slide memberfl guidedforreciproeatin '{rnoition nested and disconnected; 1

i transverse the main driyesha ft'byaparr of gibs Fig.5 lsasectional view taken on the linei- -i 45 on the base ef the sewing machine. liteciprop i i eo catio'nf 0f the? slide 44 andp therefore; lateral f zrnain'shaft I39 t-is ailoopericarrier '38, supporting Fi 3 an d View of the conneptigg i s'j 'asgan elementseparateor integral therewith a fa pair or conical, screws which engageabear- 1 movement of the looper carrier 38 and looper 36 may be effected by an eccentric, not shown, mounted on the main drive shaft 3i: and cooperable with the bearing as provided by a split block l! located between jaws d8 and- Z9 on the slide.

Rocking movement of the locper carrier 38 advantageous snap-acting means in the form of substantially U-shaped resilient member 86 having two fingers El adapted to snap into a groove 83 intermediate the bearing'porti'on 13' and tip it of the stud ll, and having a portion 89 bent at an angle to'the fingerstl adapted to fit over and looper 39 may be effected by a connecting-- rod 50, secured at one end 59 to the looper carrier 38 and provided at the other endwith a ball socket 52 operating on a ball stud-53 carried'by one arm 54 of a two-arm lever 55 secured by a 7 58 and 59 carried by a supporting bracket til secured to the machine base by screws St. The other arm 620i the lever 55 is also provided with a ball stud 63 secured thereto by a screwed. A

, ball socket 6 5,; confining the ball stud t3, and conne'cted to one end of arod G6 the other end or which is connected to an eccentric strap 65'! operable from the main drive shaft, serves 'to 'transmit themotion of the rod to oscillate the lever 55 and through the connecting rod 53 to rock the looper carrier 38 and lcopert into and out of the needle loop. l y 7 The details of the construction and operation of the means briefly described above for efiectingrocking'and lateral movements of the lcoper carrier and looper are fully illustrated and described in myprior'Pat ent No. 1,996,29 and in and of themselves form no part of the present invention.

I I However, and of importance, the present invention provides an especially advantageous'rneans 68 whereby theconnecting rodbil may bewholly and readily disconnected from the looper, carrier 38 to permit the latter and particularly its looper t 3,9 ;to be moved to a position facilitating the threading thereof and to permit a movement of the connecting rod 55 to give greater freedom to an operators fingers in threading the looper; and its thread leading eyelet member, 65' and also'in V screw 56 to a stud 51 whichoperates in bearings the threaded end M of the connecting-rod 5i) and be held in position against the ball socket member ll by a lock or holding nut 9d which also holds in position the looper thread member lb. With this construction, it will be readily appreciated,

the ball and socket assembly M is releasably maintained onthe stud ll between the shoulder it of the stud "ii, the two spring fingers til of which is aligned with.

the snap acting mernberlit 7 the apertured balllik member 32, automatically snap into thedetent groove andthus locksthe ball and socket assemblyl' l'against adverseand disassociating sliding movement longitudinally of the stud ll. 7 r

threadinga looper thread member l'il which may.

rod .50 for reciprocating movement therewith in predetermined relation withthe rocking move- ,mentof the looper '39;

The disconnecting, and also'c'onnecting, means 68 includes, as shown most clearly in Figs. '3, 4 5

and 6, a special stud 1i having a threaded end portion 12 adapted to be screwed into the'l'ooper carrier-38, In addition', this stud ll has a bearing ,"por-tiion l3, adapted to be associated with aball and socket assembly "i i secured to the end 5! of the connecting rod so, and which extends outwardly from a shoulder E5 to terminate in a ended substantially conical tip- "iii.

The ball and socket assembly l 'l comprises a ball socket member Tl, one section it or which ,may be formed in the usual manner witha portion lil for receiving the threaded end 5i of the connecting rod 5%, and the other or cap section 80 of which maybe securedto thesecticndt by screws 8| in a well-known'and conventional manner. (Of importance, however, a. ball like mem-S ber62 confinedin the socket 33v defined by the 1 sections 18 and B0 is not 'immovably,.-fixed on a stud secured to the lcoper carrier, but is; formed "with a central aperture or bore'fi l'therethrough ,adaptedjto receive the bearing portion special stud. yPreferably'a bevelled-edge 8 5 is v formed to definethe entrance to the side or" the socketlfacing the shoulder 'i'lion the stud H.

is the To maintain thestud H and balland socket assembly thu asso a e hslfii rro ded an.

,be advantageously mounted on the connecting round Vlhen it is desired to disconnect th connecting rod 56 andlooper carrier 38 it merely'is necessary to grasp the connecting rod or ball and socket assembly and pull the same laterallyaway from the looper carrier. This pull causes the spring'fingers 8;? automatically to slide up and out of the detent groove 88, whereupon, the complete'disassociation of looper carrier and connecting rod is asimple matter. 7 f 5 Accordingly, with the present invention it is seenithatvwh'lle in associated relation the looper carrier and-connecting rodlmay be effec tively connected through a ball and socket. as: sembly M "which permits universal 0r substantially universalmovement between the elements, they are also adapted'to be wholly disconnected to permit advantageous independent movement of the locper carrier Sit and looper as, and the connecting rod Eli.

This independent movement of the looper carrier and looper, made possible by the novel utilization of the connecting and disconnecting means enables therlocper to be swung to a 'retracted'position, not possible while the loop'er carrier is connected to the connecting rod, where ready access for threadingmay be hadeither through the front of the lower arm or through a special opening 9i which, desired, may-be ;provided' in the'cicthfplate and'clo'sed bye removable closnre plate '92. Moreover, by moving the connecting rod away from the lcoper',

greater freedom of movement is afforded the fingers or handset an operator in threading the looperiitand its thread leading eyeletmember 89 as w ellias'the looper thread member it} carried by, the connecting rod Eli. As in the case lof the loop'er td the l'ooper thread mernber'flil may be, readily threaded-either through the front of the lower arm or through the opening ill-in the cloth' plate. When the connecting rod 59; is swung upwardly to move th thread memberi nto are in said operative-association. 1 l M the opening 9| the latterrnember may bethread l ed abovethe work plate.

Variations'fand modifications: may be made,

withinthe scope of this inventionand portions of the improvements maybe used without others.{

I Having thus described the invention, what is claimed as newis: i i

. l. In a sewing machine having amber can; nor member with alooper and mounted for rockfing movemennthe combinationoi a connecting rod member for rocking said-looper carrier mem her. and looper; aball and' socket means carried by one of said members: connecting means 'onf M thej'other of said members; slidable relativeto, :and in and out of operativeassociation with"= sa.id

ball and socket means; and yielding means car; .riedby said one of said members and movable therewith andwith said balland socketmeansi relative to said cor'inecting means for releasably locking said connecting meansand saideballand socketmeans in operative association;

' 2.'In a sewing machinehaving a driving come ponent andanoperating component, the comblnation of a ball socket member on oneof said components; an apertured ball element confined in saidsocket member; a connecting element on' the other of said fcornponents slidable relative to and in and out ofiloperative associationwith saidapertured ball element; and resilient detent means supportedwlth one of said elements fo'r f relative movement therewith with respectxto the other 01' 'said elements when the element'sf ar'e slid into operative association with respect i each other, for arresting relative longitudinal sliding movement of said connecting element and said apertured ball element when lsaid el ements carrier and extending through and slidable longi tudinally relativeto saidapertured ball member;

and a retaining member engageable in said grooVefOr maintaining said ball socket member and said connecting stud in operative association.

6.1In a sewing machine having a loopercarrier mounted for rocking movement and a connecting rod member for rocking said looper carrier, the

socket member and said con-f nectingstud in operative association. v i u V *5 '7. In a sewing machine having a looper carrier;

element mounted for rocking movement and a l connecting rodelement for rocking' said looper '25 carrier element, thecombination ofaball socket member confining can apertured ball member therein, carried by one or said elements; a connecting; means'on the other of said elements, slidable'longitudinally relative to and into and out of said apertured ball member; and snap-acting meansymovable with said ball socket: member andaligned with' said apertured ballmemberfor automaticallylocking said apertured ball memej ber o'njsaid connecting member when thelatter members are slid into operative association with respect to each other.

,3. In-Ta'sewing machine having a looper car longitudinallyrelative to and in and out of opw erative association with saidapertured ball member;jand detent means supported and movable with, said ball socket member, engageable in said groove for arresting relative i'lon'gitudinal sliding movement between saidconnectingmeans and 1 said ball socket and apertured ball members.

4. Ina sewing machinehavin'g a looper'carrier mounted ior. rocking movement and a, connecting rod member for rocking said looper carrier; the I combination or a ball socket member having an apertured ball member conflnedtherein, carried rier element mounted for rocking movement anda connecting rodelementforrockingsaid. loo'pr carrier element, the combination of a ball' socket ymember carried. by onejot' said elements; ;an-. .1

apertured' ball member confined in said socket member; connecting means on the other, of said 3 elements, havinga groove therein andslidable' 8. In a sewing machine having a looper carrier ,7 element mounted for rocking movement and a 5 "connecting rodelementfor rocking said looper carrier, element, the, combination" of a ball socket.

member carried by one of said elementsian'aperjtured'ball member confined in said socket member; connecting means on the other of said elements, having a groove therein and slidable Ionv gitudinally relative to and in; and onto: operative association with said :apertured ball member; a

looper. thread member mountedon and movable I with said connecting rod byfsaid connecting: rod member; aconnectlng Y studcarried bysaid looper can-ier,havmg a.

groove therein, extending into and slidable longi tudlnallyrelative to said aper ul' d ball member;

and a spring flngercarried-bysaidconnecting rod memberjfor' snapping into said groove and arresting relative longitudinal sliding; movement between said connecting stud and saidballsocket member.

' 5. Ina sewing machln a -1 Q rod member for rocking said looper carrlen the combination of .a ball socket member confining an apertured ball member carried, by said connectlngrodmember; a connectingstud mounted for rocking movement ands. connecting y element; and detent mean supported by and movable with said ball 1 socket member, engageable lnsaid groove for arresting relative longitudlnal 'sliding .movement V between. said connecting meansfand said ball socket and apertured ball members. i i 9,. In, a sewingmach'ine having a looper carrier.

element mounted for j rocking movementv and" a j connecting rod element for rocking said looper carrier element,.the combination of a ball-socket means confining an apertured ball member therein'gcarried by'one of said elements; a con-] meeting-stud member carriedby the otheroi said elements andexten'ding through andslidable longitudinally relative to said apertured ball mem- 3 i her, one of said members havingadetent-receiv- 'ing means associated therewithrand a resilient 1 detent supportedand movable with'the other of said members relative to said member having a detent-receiving means, engageable. in said do?" tent-receiving means when said membersare slid longitudinally relative to each other, for main- Qtaining said members inoperative association. i i I ALBERT nwars. 31.

having agroove therein,, carried by said looper 

